148 
Prof, Egleston reviewed the different systems in order, 
pointing out the principal modes of striation in each, and the 
importance which attaches to them in the study of crystallo- 
graphy. Like the preceding, this paper was largely illus- 
trated, and cannot be readily presented otherwise. 
Pror. H. Wurtz gave an account, under the title of 
“Products of Alteration in the Palisade Rocks,” of several pe- 
culiar altered minerals, mainly amorphous, from the trap- 
ridge of Hudson. City and Weehawken. He exhibited nu- 
merous specimens, with observations and analyses. Some 
of these substances may prove worthy to rank as new species. 
Pror. Leepsand Prof. D. S. MARTIN discussed the paper of » 
Dr. Wurtz, and showed a number of other specimens of the 
same or similar minerals, for comparison, also from the Ber- 
gen Ridge. 
The last paper announced for the evening was prepared by 
Mr. I. C. Warts, andentitled “Notes on the Upper Coal 
Measures of Pennsylvania and West Virginia ;” but the hour 
being late, it was deferred. 
May 25th. 
Pres, Newserry in the chair. Twenty-three persons present. 
Dr. FEUCHTWANGER showed specimens of bismuth ochre, 
lately discovered near Silver City, Utah. 
The following paper was read by title :— 
“On the Genitalia and Lingual Dentition of Pulmonata, 
by W. G. Binney, with six plates;” (published in the 
Annals, Vol. XI. No. 1). 
The author gives descriptions, with figures, of the genitalia 
and lingual dentition of a considerable number of species not 
hitherto examined, of the following genera,—Limax, Zonites, 
Helix, Strophia, Geomalacus, Bulimus, Cylindrella, Bulimulus, 
Orthalicus, Liguus, and Succinea. He also describes Pallifera 
Wetherbyi, a new species recently found near the mouth of 
